Debt Instrument, Basis Spread on Variable Rate, Adjustment

No definition available.

Name:	comp_DebtInstrumentBasisSpreadOnVariableRateAdjustment
Namespace Prefix:	comp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Liquidity

+ References

No definition available.

+ Details

Name:	comp_DebtInstrumentCovenantLiquidity
Namespace Prefix:	comp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Covenant. Required Consolidated Revenue Threshold

+ References

No definition available.

+ Details

Name:	comp_DebtInstrumentCovenantRequiredConsolidatedRevenueThreshold
Namespace Prefix:	comp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt [Line Items]

+ References

No definition available.

+ Details

Name:	comp_DebtLineItems
Namespace Prefix:	comp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Commitment Fee Period

+ References

No definition available.

+ Details

Name:	comp_LineOfCreditFacilityCommitmentFeePeriod
Namespace Prefix:	comp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility maximum borrowing capacity sublimit.

+ References

No definition available.

+ Details

Name:	comp_LineOfCreditFacilityMaximumBorrowingCapacitySublimit
Namespace Prefix:	comp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Unused Capacity, Commitment Fee, Threshold

+ References

No definition available.

+ Details

Name:	comp_LineOfCreditFacilityUnusedCapacityCommitmentFeeThreshold
Namespace Prefix:	comp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-15

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-12

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=comp_ConciergeRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	comp_CreditFacilityUtilizationAxis=comp_ConciergeFacilityUsedGreaterThanFiftyPercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	comp_CreditFacilityUtilizationAxis=comp_ConciergeFacilityUsedLessThanFiftyPercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	comp_DebtCovenantPeriodAxis=comp_FourFiscalQuartersOf2024AndThereafterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=comp_SecuredOvernightFinancingRateSOFRTermRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=comp_DebtDefaultInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Details) - USD ($) $ in Millions		6 Months Ended
Debt (Details) - USD ($) $ in Millions	Aug. 01, 2025	Jun. 30, 2025	Dec. 31, 2024	Mar. 31, 2021	Jul. 31, 2020
Debt [Line Items]
Outstanding letters of credit		$ 33.3	$ 53.8
Concierge Credit Facility
Debt [Line Items]
Maximum borrowing capacity					$ 75.0
Debt instrument, interest rate (as percent)		7.24%
Concierge Credit Facility \| Concierge Facility Used Greater Than Fifty Percent \| Subsequent Event
Debt [Line Items]
Commitment fee, payment period (in years)	two year
Unused capacity commitment fee (as percent)	0.35%
Line of credit facility, unused capacity, commitment fee, threshold (as percent)	50.00%
Concierge Credit Facility \| Concierge Facility Used Less Than Fifty Percent \| Subsequent Event
Debt [Line Items]
Unused capacity commitment fee (as percent)	0.50%
Line of credit facility, unused capacity, commitment fee, threshold (as percent)	50.00%
Concierge Credit Facility \| Secured Overnight Financing Rate (SOFR) \| Subsequent Event
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)	2.50%
Revolving Credit Facility
Debt [Line Items]
Maximum borrowing capacity		$ 350.0		$ 350.0
Unused capacity commitment fee (as percent)		0.175%
Debt instrument, interest rate (as percent)		5.81%
Line of credit facility maximum borrowing capacity sublimit				$ 125.0
Outstanding borrowings		$ 50.0
Revolving Credit Facility \| Minimum
Debt [Line Items]
Liquidity required by financial covenants		150.0
Revolving Credit Facility \| Four Fiscal Quarters Of 2024 And Thereafter \| Minimum
Debt [Line Items]
Required consolidated revenue threshold		$ 4,668.0
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)		1.50%
Debt instrument, basis spread on variable rate, adjustment (as percent)		0.10%
Revolving Credit Facility \| Base Rate
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)		0.50%
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) Term Rate
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)		1.00%
Revolving Credit Facility \| Fed Funds Effective Rate Overnight Index Swap Rate
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)		0.50%
Revolving Credit Facility \| Debt Default Interest Rate
Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)		2.00%
Letter of Credit
Debt [Line Items]
Outstanding letters of credit		$ 33.3